The MAX1945 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains a high-efficiency step-down switching-regulator circuit for applications requiring on-board postregulation. The circuit utilizes a MAX1945R regulator featuring ±4% voltage margining and is configured for a 1.8V output voltage. The circuit provides up to 6A of current. A 2.6V to 5.5V DC source can be utilized to power the circuit's input.
The MAX1945R IC features an internal power MOSFET switch and an internal synchronous rectifier. The MAX1945 EV kit provides connections for the SYNC input. It also provides an output to synchronize another MAX1945 EV kit clock 180 degrees out-of-phase. Pulse-width modulated (PWM) operation at 500kHz allows the use of tiny surface-mount components.
Key Features
Applications/Uses
0.970in x 0.840in Circuit Footprint
2.6V to 5.5V Input Range
Output Voltage
1.8V/2.5V Preset
0.8V to 0.85 x VIN Adjustable
Provides Up to 6A Output Current
±4% Voltage Margining
Internal Power Switch and Synchronous Rectifier
500kHz/1MHz PWM Selectable Switching Frequency
SYNC Input: Synchronizes from 400kHz to 1.2MHz TTL/CMOS Clock
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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